libproxy 0.5.6 update + configuration

Context

libproxy configuration needs update

Description

In order to allow applications running in e.g. flatpak environment to access proxys the latest version must be used. It adds a new plugin which is capable to talk to xdp desktop proxy resolver. Furthermore the follow options are necessary:

• "-Dintrospection=false",
• "-Drelease=true",
• "-Ddocs=false"

That means that ALL plugins are configured and that duktape and curl are enabled. This is a mandatory required as otherwise PAC proxies aren't support and thus will block most companies.

Acceptance Criteria

• libproxy has been updated to 0.5.6 and the above and only the above settings are applied.
• libproxy is compiled with duktape and curl support.